9. Is salt water isotonic, hypotonic, or hypertonic relative to the cytoplasm of sea urchin eggs? Discuss the effects of hypotonic and hypertonic solutions on sea urchin eggs and/or embryos. Discuss the effects of hypotonic and hypertonic solutions on fresh water protists such as paramecia. Discuss the effects of hypotonic and hypertonic solutions on plant tissue such as elodea leaves. Compare and contrast how these different cell types respond to the different tonicities. What strategies do some organisms have that allow them to live in environments that are hypertonic to their cytoplasm? Conversely, what strategies might be employed to live in hypotonic environments?